Combine2D returns the combination of s1 and s2 elements.

Contains reports whether v is present in s.

ContainsAny 数组中包含任意一个元素.

Delete removes the elements s[i:i+1] from s, returning the modified slice.

Distinct 返回去重后的元素.

Distinct2D remove duplicate two-dimensional arrays.

Duplicate 返回重复的元素.

Equal reports whether two slices are equal: the same length and all elements equal.

Equal2D reports whether two slices are equal: the same length and all.

EqualFunc reports whether two slices are equal using a comparison function on each pair of elements.

EqualIgnoreOrder 先排序再比较，不同排序的切片对比返回true.

EqualIgnoreOrder2D reports whether two slices are equal: the same length and all.

Extract 提取切片中某个属性的集合.

Index returns the index of the first occurrence of v in s, or -1 if not present.

IndexFunc returns the first index i satisfying f(s[i]), or -1 if none do.

Int64ToLong convert int64 slice to long slice.

Intersect 返回交集并去重.

IntToString 整型切片转为字符串切片.

Join2D concatenate the elements of an array with sep.

LongToInt64 convert long slice to int64 slice, ignore nil value.

Slice return a slice type.

StringToInt 字符串切片转为整型切片，E为转换后的整型类型.

Subtract returns the elements in `s1` that aren't in `s2`.

Subtract2D returns the elements in `s1` that aren't in `s2`.

SubtractDistinct 返回差集并去重.

Sum 求和.

Union 返回并集并去重.